diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index 3814a9263d64e..294cd2a408181 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -379,7 +379,7 @@ static inline void iosubmit_cmds512(void __iomem *dst, const void *src,
 	const u8 *end = from + count * 64;
 
 	while (from < end) {
-		movdir64b(dst, from);
+		movdir64b_io(dst, from);
 		from += 64;
 	}
 }
diff --git a/arch/x86/include/asm/special_insns.h b/arch/x86/include/asm/special_insns.h
index f13df37c00600..2e9fc5c400cdc 100644
--- a/arch/x86/include/asm/special_insns.h
+++ b/arch/x86/include/asm/special_insns.h
@@ -224,10 +224,10 @@ static inline void serialize(void)
 }
 
 /* The dst parameter must be 64-bytes aligned */
-static inline void movdir64b(void __iomem *dst, const void *src)
+static inline void movdir64b(void *dst, const void *src)
 {
 	const struct { char _[64]; } *__src = src;
-	struct { char _[64]; } __iomem *__dst = dst;
+	struct { char _[64]; } *__dst = dst;
 
 	/*
 	 * MOVDIR64B %(rdx), rax.
@@ -245,6 +245,11 @@ static inline void movdir64b(void __iomem *dst, const void *src)
 		     :  "m" (*__src), "a" (__dst), "d" (__src));
 }
 
+static inline void movdir64b_io(void __iomem *dst, const void *src)
+{
+	movdir64b((void __force *)dst, src);
+}
+
 /**
  * enqcmds - Enqueue a command in supervisor (CPL0) mode
  * @dst: destination, in MMIO space (must be 512-bit aligned)